Probleme With Threads.

[Florent Blanchon <florent blanchon gmail com>]

Hello to all.

 

I've a big problem.

I'm using plotmm to display a curve (normal).

 

the datas I want to display come frome a ComPort (or a blocking Socket).

 

I've tried with a pthread mechanism, by passing main class in argument, but, when I arrive at

 

PlotTest->m_plot.scale(PlotMM::AXIS_LEFT)->set_range( Ymin, Ymax);

 

I've this message :

 

fatal io error 11 resource temporarily unavailable on x server 0.0

 

 

below, is the code I want to be implemented in a thread because I wait before receiving data :

Thanks for your help.

Flo

 

bool PlotTest::LoopReceive()
{
//PlotTest *MainLoop = (PlotTest*)pt;

double data[2000];
char cbuffer[6033];
int recu;
int taille;
int frequence;
int intcurve;
double ymax;
double ymin;

 recu = 0;
 memset(cbuffer, 0, 6033);

 std::cout << "Top Receive" <<std::endl;
 while(recu != 33)
 {
  recu += Rs->recv((char*)cbuffer + recu, 33 - recu);
 }

 taille = *(short*)&cbuffer[14];
 
 frequence = *(short*)&cbuffer[2];
 
 while(recu != taille)
 {
  recu += Rs->recv((char*)cbuffer + recu, taille - recu);
 }

 // 20Hz
 if(taille == 93)  intcurve = 20;
 if(taille == 633) intcurve = 200;
 
 // 50Hz
 if(taille == 183) intcurve = 50;
 if(taille == 1533) intcurve = 500;
 
 //100Hz
 if(taille == 333) intcurve = 100;
 if(taille == 3033) intcurve = 1000;
    Glib::Timer timer;
    timer.start();
 //200Hz
 if(taille == 633)  intcurve = 200;
 if(taille == 6033) intcurve = 2000;
 
     ymax = -G_MAXFLOAT;
     ymin = G_MAXFLOAT;
 
 
 for(int i = 0; i < intcurve; i++)
 {
  int t =0;
  unsigned  char *A;
  A =(unsigned char*) &t;
  int u = 0;
  unsigned char *B;
  B = (unsigned char*)&u;

  *(A+3) = cbuffer[30 + 3*i]&0x80?0xff:0x00;
  *(A+2) = cbuffer[30 + 3*i];
  *(A+1) = cbuffer[29 + 3*i];
  *(A)   = cbuffer[28 + 3*i];
  
  data[i] = t;
  if(t > ymax) ymax = t;
  if(t < ymin) ymin = t;
 
 }

myCurve1->set_data(x,data,intcurve);
m_plot.scale(PlotMM::AXIS_LEFT)->set_range(ymin+ymin/10,ymax + ymax/10);
m_plot.replot();
 
 
}